Skyworks Solutions Inc. SI5334K-B04797-GM

Overview

SI5334K-B04797-GM from Skyworks Solutions is a pin-controlled, quad-output any-frequency clock generator with four independently configurable differential clock outputs, 0.7 ps RMS typical phase jitter, factory-programmed configuration, and support for LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL output formats up to 710 MHz. It operates from 1.8/2.5/3.3 V core supply and targets high-precision timing in PCIe 3.0, Ethernet switch/router, and broadcast video systems.

For engineers reviewing the SI5334K-B04797-GM datasheet, SI5334K-B04797-GM pinout, SI5334K-B04797-GM application, or SI5334K-B04797-GM equivalent, key selection criteria include its MultiSynth-based zero-ppm frequency synthesis, per-output voltage control (1.5–3.3 V), 20 ps phase adjustment resolution, and PCI Express 2.0-compliant spread spectrum on 100 MHz outputs.

Technical Context

The SI5334K-B04797-GM implements a fractional-N PLL architecture with integrated VCO and four independent MultiSynth synthesis stages, each feeding one of four differential output drivers. Its input stage accepts crystal (8–30 MHz) or differential/single-ended clocks (5–710 MHz), while synthesis supports integer and fractional modes with ≤1 ppb frequency resolution.

Each output driver features independent format selection (LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL), independent output supply voltage (1.5/1.8/2.5/3.3 V), and programmable phase offset (±45 ns in 20 ps steps). The device includes loss-of-signal (LOSLOL) and loss-of-lock detection, pin-controlled frequency increment/decrement (1 ppm steps, glitchless), and optional zero-delay mode via external feedback.

Key Specifications

Pinout & Package

SI5334K-B04797-GM is housed in a 4 mm × 4 mm, 24-pin QFN package with exposed thermal pad (RoHS-compliant, lead-free). Pin assignments are fixed per the Si5334 family and validated for this variant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock generator applications.

Compared with Si5332A-D08889-GM and ICS8430I-01T, the SI5334K-B04797-GM delivers optimal balance of factory-programmed simplicity, pin-controlled real-time tuning, and PCIe 2.0-compliant spread spectrum-making it ideal for volume industrial and telecom designs requiring deterministic startup and EMI control without software overhead.

Availability

SI5334K-B04797-GM is available at Aetrix Electronics and suitable for Ethernet switch/router timing, PCIe 3.0 clocking, and broadcast video/audio timing requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for SI5334K-B04797-GM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global leader in analog semiconductors, specializing in RF, timing, and precision analog solutions for communications, automotive, and industrial markets.

The Si5334 product line delivers pin-configurable, low-jitter clock generation for high-speed serial interfaces-including PCIe, Ethernet, and broadcast video-where deterministic startup, frequency flexibility, and EMI reduction are critical.

FAQ

What is the primary function of the SI5334K-B04797-GM in a timing architecture?

The SI5334K-B04797-GM serves as a quad-output, any-frequency clock generator that synthesizes four independent, low-jitter differential clock signals from a single crystal or reference input. Its MultiSynth technology ensures zero ppm frequency error and 0.7 ps RMS jitter, making SI5334K-B04797-GM essential for synchronizing high-speed SerDes lanes, FPGAs, and processors in telecom and datacom systems.

Does the SI5334K-B04797-GM support spread spectrum clocking, and if so, under what conditions?

Yes, the SI5334K-B04797-GM supports PCI Express 2.0-compliant spread spectrum on any output clock operating at exactly 100 MHz with its Rn divider set to 1. The modulation rate is 30–33 kHz with ±0.5% frequency deviation. This feature is enabled via factory programming and cannot be modified in-field, ensuring consistent EMI reduction without runtime configuration overhead for SI5334K-B04797-GM.

Can the SI5334K-B04797-GM generate different output formats simultaneously, such as LVDS and HCSL?

Yes, the SI5334K-B04797-GM supports simultaneous mixed-format outputs: each of its four differential output pairs (CLK0–CLK3) can be independently configured for LVPECL, LVDS, HCSL, CML, SSTL, or HSTL. This allows SI5334K-B04797-GM to drive heterogeneous loads-e.g., an FPGA bank requiring LVDS and a SerDes requiring HCSL-without external level-shifting circuitry.

What is the significance of the "K" suffix in SI5334K-B04797-GM?

The "K" in SI5334K-B04797-GM denotes the specific factory-programmed variant supporting PCI Express 2.0-compliant spread spectrum on 100 MHz outputs. Per Skyworks documentation, SI5334K devices are pre-configured for SSC functionality, whereas other variants (e.g., "D", "G") offer pin-controlled phase or frequency tuning instead. This makes SI5334K-B04797-GM optimized for EMI-sensitive PCIe and Ethernet applications.

How does the SI5334K-B04797-GM handle loss-of-signal detection, and what is the response time?

The SI5334K-B04797-GM monitors input clocks via dedicated LOSLOL circuitry and asserts the open-drain LOSLOL pin within 2.6–5 µs of signal loss. This fast response enables real-time system fault detection and failover triggering. The SI5334K-B04797-GM also provides loss-of-lock detection with 5–10 ms assertion time, allowing robust clock monitoring in mission-critical telecom and industrial timing applications.